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<br />~~. <br />,~-, .-.-'. ' -. <br />.' '; <br /> <br />, <br /> <br />~f <br /> <br /> <br />:......4 1110-2-1601 <br />Appendix IV <br />1 July 70 <br /> <br />. <br /> <br /> <br /> Xl' ETe .1 <br /> "'. <br /> @ <br />A, "z <br />,~ - ~ <br /> <br />51' ". ... <br />0 @ <br />'" A~ <br />2 . <br /> <br /> <br />1;m <br /> <br />~ <br /> <br /> <br />x <br />\ " \ <br />~~[pl <br /> <br />'. <br />sue..SE:CT10N n <br /> <br />CHANNEl- GEOMETRY <br /> <br />i <br />,j <br />I~ <br /> <br />( <br />, <br />, <br /> <br /> Q'T = ~Qn;:: 20,000 CF'S <br />suaSECTION ~ ~ ~ @ @ <br />Xn' FT 30.0 50.0 57.0 13.0 60.0 <br />'tn' FT 7.' 1..Q IUS ... '.D <br />AREA "n' FTil 225.0 700.0 655.0 106.0 180.0 <br />k " 1.33 ,.. ,., ,.. '.D <br />p " 33.5 50.0 $7.0 13.6 SO.3 <br />I-lYOFlAUL1C RAOIUS Rn '.7 14.0 11.$ 7.7 ,.. <br />C tF'LATE lJZ-2.1 ,. ., " .. " <br />leRl/al " ,,, ". '93 '54 54 <br />IC~'/a) A " 10~' 3... 1&5.2 126.4 '3.g '.7 <br /> " " <br />iCRl/al~A "'0~' 0.81 9,20 4." 0.25 0.0) <br /> " " <br />(CRJ/Zl A "'0.8 0.23 2.31 1.4$ 0,11 D." <br /> " " <br /> [ ]'" <br /> A n = Xn'fn' WETTEO PERIMETER Pn;:: X~ + (.:lYn,1 <br /> A <br /> A - -!! kn = EFFECTIVE I'ItOUGHNIESS HEIGHT <br /> n - po . <br /> " <br /> On;:: AnVn' A = LAi' 0", = LQi <br /> GEOMETRIC PROPERTIES <br /> <br />, <br /> <br />. <br /> <br />. <br /> <br />ALPHA METHOD <br />GEOMETRIC COMPUTATIONS <br /> <br />Plate IV - 1 <br /> <br />IV -6 <br />